TFT

JSON Key-Value Extractor

Extract specific keys from JSON objects or arrays. Paste your JSON, enter the key names you want to extract, and get clean, filtered results instantly.

Output Format

About JSON Key-Value Extractor

Working with large JSON datasets often means wading through fields you don't need. Whether you're cleaning API responses, preparing data for analysis, or debugging nested structures, manually filtering JSON is tedious. This JSON key extractor solves that problem by letting you specify exactly which keys you want to keep, then instantly generating a clean, filtered result.

How to Extract Keys from JSON

  1. Paste your JSON object or array of objects into the input field
  2. Enter the key names you want to extract, separated by commas
  3. Choose your preferred output format (array or single object)
  4. Click "Extract Keys" and copy your filtered results

Features

  • Handles arrays and objects: Works with both single JSON objects and arrays of objects
  • Flexible output formats: Choose between array of objects or a single grouped object
  • Instant results: All processing happens in your browser with no server delays
  • One-click copy: Copy extracted results to clipboard instantly

Frequently Asked Questions

Can this tool handle nested JSON objects?

Currently, this extractor works with top-level keys only. For nested key extraction, try our JSON path query tool.

What happens if a key doesn't exist in the JSON?

Missing keys are silently skipped. The output will only contain keys that were found in the input JSON.

Is my JSON data sent to a server?

No. All processing happens locally in your browser. Your data never leaves your device.

Can I extract keys from a JSON array?

Yes. Paste a JSON array of objects and the tool will extract the specified keys from each object in the array.

What's the difference between array and object output?

Array output gives you an array of filtered objects. Object output groups all values by key, useful for collecting all values of each field.

Related JSON Tools

If you're working with JSON data, you might also find these tools useful: